From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/hw/acpi/cpu_hotplug.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 qemu/hw/acpi/cpu_hotplug.c (limited to 'qemu/hw/acpi/cpu_hotplug.c') diff --git a/qemu/hw/acpi/cpu_hotplug.c b/qemu/hw/acpi/cpu_hotplug.c new file mode 100644 index 000000000..f5b9972f2 --- /dev/null +++ b/qemu/hw/acpi/cpu_hotplug.c @@ -0,0 +1,76 @@ +/* + * QEMU ACPI hotplug utilities + * + * Copyright (C) 2013 Red Hat Inc + * + * Authors: + * Igor Mammedov + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ +#include "hw/hw.h" +#include "hw/acpi/cpu_hotplug.h" + +static uint64_t cpu_status_read(void *opaque, hwaddr addr, unsigned int size) +{ + AcpiCpuHotplug *cpus = opaque; + uint64_t val = cpus->sts[addr]; + + return val; +} + +static void cpu_status_write(void *opaque, hwaddr addr, uint64_t data, + unsigned int size) +{ + /* TODO: implement VCPU removal on guest signal that CPU can be removed */ +} + +static const MemoryRegionOps AcpiCpuHotplug_ops = { + .read = cpu_status_read, + .write = cpu_status_write, + .endianness = DEVICE_LITTLE_ENDIAN, + .valid = { + .min_access_size = 1, + .max_access_size = 1, + }, +}; + +static void acpi_set_cpu_present_bit(AcpiCpuHotplug *g, CPUState *cpu, + Error **errp) +{ + CPUClass *k = CPU_GET_CLASS(cpu); + int64_t cpu_id; + + cpu_id = k->get_arch_id(cpu); + if ((cpu_id / 8) >= ACPI_GPE_PROC_LEN) { + error_setg(errp, "acpi: invalid cpu id: %" PRIi64, cpu_id); + return; + } + + g->sts[cpu_id / 8] |= (1 << (cpu_id % 8)); +} + +void acpi_cpu_plug_cb(ACPIREGS *ar, qemu_irq irq, + AcpiCpuHotplug *g, DeviceState *dev, Error **errp) +{ + acpi_set_cpu_present_bit(g, CPU(dev), errp); + if (*errp != NULL) { + return; + } + + acpi_send_gpe_event(ar, irq, ACPI_CPU_HOTPLUG_STATUS); +} + +void acpi_cpu_hotplug_init(MemoryRegion *parent, Object *owner, + AcpiCpuHotplug *gpe_cpu, uint16_t base) +{ + CPUState *cpu; + + CPU_FOREACH(cpu) { + acpi_set_cpu_present_bit(gpe_cpu, cpu, &error_abort); + } + memory_region_init_io(&gpe_cpu->io, owner, &AcpiCpuHotplug_ops, + gpe_cpu, "acpi-cpu-hotplug", ACPI_GPE_PROC_LEN); + memory_region_add_subregion(parent, base, &gpe_cpu->io); +} -- cgit 1.2.3-korg